S. W. Finch
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View article: Finite-Geometry Corrections for Neutron Scattering Cross Section Measurements
Finite-Geometry Corrections for Neutron Scattering Cross Section Measurements Open
View article: Precision 12C(α,γ) Angular Distribution Measurements: First Significant Physics Result with a Time Projection Chamber Operating in Gamma Beams
Precision 12C(α,γ) Angular Distribution Measurements: First Significant Physics Result with a Time Projection Chamber Operating in Gamma Beams Open
The carbon oxygen ratio (C/O) at the end of stellar helium burning is a crucial nuclear input to stellar evolution theory. It is determined by the rate of oxygen formation in the fusion of helium with 12C, denoted as 12
View article: Trithiol ligand provides tumor-targeting 191Pt-complexes with high molar activity and promising in vivo properties
Trithiol ligand provides tumor-targeting 191Pt-complexes with high molar activity and promising in vivo properties Open
Purpose: The Auger electron-emitting radionuclide 191Pt is a promising candidate for radiopharmaceutical therapy. Herein, we explored novel labeling methods for 191Pt using thiol-containing ligands to improve the in vivo stability and targ…
View article: Deviations from the Porter-Thomas Distribution due to Nonstatistical <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>γ</mml:mi></mml:mrow></mml:math> Decay below the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Nd</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>150</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math> Neutron Separation Threshold
Deviations from the Porter-Thomas Distribution due to Nonstatistical Decay below the Neutron Separation Threshold Open
We introduce a new method for the study of fluctuations of partial transition widths based on nuclear resonance fluorescence experiments with quasimonochromatic linearly polarized photon beams below particle separation thresholds. It is ba…
View article: Deviations from the Porter-Thomas Distribution due to Nonstatistical $γ$ Decay below the $^{150}$Nd Neutron Separation Threshold
Deviations from the Porter-Thomas Distribution due to Nonstatistical $γ$ Decay below the $^{150}$Nd Neutron Separation Threshold Open
We introduce a new method for the study of fluctuations of partial transition widths based on nuclear resonance fluorescence experiments with quasimonochromatic linearly polarized photon beams below particle separation thresholds. It is ba…
View article: Gamma Decay of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Sm</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>154</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math> Isovector Giant Dipole Resonance: Smekal-Raman Scattering as a Novel Probe of Nuclear Ground-State Deformation
Gamma Decay of the Isovector Giant Dipole Resonance: Smekal-Raman Scattering as a Novel Probe of Nuclear Ground-State Deformation Open
γ decays of the isovector giant dipole resonance (IVGDR) of the deformed nucleus Sm
View article: Transition width of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mi>J</mml:mi><mml:mi>π</mml:mi></mml:msup><mml:mo>=</mml:mo><mml:msup><mml:mn>1</mml:mn><mml:mo>−</mml:mo></mml:msup></mml:mrow></mml:math> two-phonon state of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Sr</mml:mi><mml:mprescripts/><mml:none/><mml:mn>88</mml:mn></mml:mmultiscripts></mml:math>
Transition width of the two-phonon state of Open
The ground-state decay width of the two-phonon $J$$π$ = $1$–, 4742 keV state of 88Sr has been determined with the relative self-absorption method combined with a monoenergetic photon beam. This width is imp…
View article: Gamma decay of the $^{154}$Sm Isovector Giant Dipole Resonance: Smekal-Raman Scattering as a Novel Probe of Nuclear Ground-State Deformation
Gamma decay of the $^{154}$Sm Isovector Giant Dipole Resonance: Smekal-Raman Scattering as a Novel Probe of Nuclear Ground-State Deformation Open
Gamma decays of the isovector giant dipole resonance (GDR) of the deformed nucleus $^{154}$Sm from $2^+_1$-Smekal-Raman and elastic scattering were measured using linearly polarized, quasimonochromatic photon beams. The two scattering proc…
View article: Observation of d(t,n)α Neutrons Following d(d,p)t Reactions in a Deuterium Gas Cell: An Attempt to Repeat Ruhlig’s 1938 Observation of Secondary Reactions
Observation of d(t,n)α Neutrons Following d(d,p)t Reactions in a Deuterium Gas Cell: An Attempt to Repeat Ruhlig’s 1938 Observation of Secondary Reactions Open
In order to benchmark methods used to calculate reaction-in-flight fusion reactions in inertial confinement fusion and address issues related to the first claimed observation of d(t,n)α reactions in 1938, secondary d(t,n)α reactions have b…
View article: Low-lying dipole response of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Ni</mml:mi><mml:mprescripts/><mml:none/><mml:mn>64</mml:mn></mml:mmultiscripts></mml:math>
Low-lying dipole response of Open
In this work, two complementary real-photon scattering experiments were conducted on the proton-magic 64Ni nucleus to study the dipole response up to its neutron-separation energy of $S_n$ = 9.7 MeV. By combining both measuremen…
View article: Energy dependence of fission product yields in the second-chance fission region
Energy dependence of fission product yields in the second-chance fission region Open
An extensive dataset of cumulative fission product yields has been generated under a joint collaboration between Los Alamos National Laboratory (LANL), Lawrence Livermore National Laboratory (LLNL), and the Triangle Universities Nuclear La…
View article: Characterization of 235U, 238U and 239Pu fission ionization chamber foils by <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si42.svg" display="inline" id="d1e2151"><mml:mi>α</mml:mi></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si288.svg" display="inline" id="d1e2157"><mml:mi>γ</mml:mi></mml:math>-ray spectrometry
Characterization of 235U, 238U and 239Pu fission ionization chamber foils by and -ray spectrometry Open
View article: Energy-Dependent Fission-Product Yields in the Region of Second-Chance Fission
Energy-Dependent Fission-Product Yields in the Region of Second-Chance Fission Open
The energy dependence of high-yield fission products has been measured using quasi-monoenergetic neutron beams at energies between 5.5 and 11.0 MeV. The absolute number of fissions during the irradiation period was determined via dual-fiss…
View article: Testing shell-model interactions at high excitation energy and low spin: Nuclear resonance fluorescence in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Ge</mml:mi><mml:mprescripts/><mml:none/><mml:mn>74</mml:mn></mml:mmultiscripts></mml:math>
Testing shell-model interactions at high excitation energy and low spin: Nuclear resonance fluorescence in Open
With their complex low-spin structure, the germanium isotopes have accrued a large number of experimental data which challenge nuclear models. The structure of the 74Ge isotope is investigated here with nuclear resonance fluores…
View article: Observation of Low-Lying Isomeric States in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Cs</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>136</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>: A New Avenue for Dark Matter and Solar Neutrino Detection in Xenon Detectors
Observation of Low-Lying Isomeric States in : A New Avenue for Dark Matter and Solar Neutrino Detection in Xenon Detectors Open
We report on new measurements establishing the existence of low-lying isomeric states in ^{136}Cs using γ rays produced in ^{136}Xe(p,n)^{136}Cs reactions. Two states with O(100) ns lifetimes are placed in the decay sequence of the ^{136}C…
View article: Fission product yields from the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mmultiscripts><mml:mi mathvariant="normal">U</mml:mi><mml:mprescripts/><mml:none/><mml:mn>238</mml:mn></mml:mmultiscripts><mml:mo>(</mml:mo><mml:mi>n</mml:mi><mml:mo>,</mml:mo><mml:mi>f</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:math> reaction at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>E</mml:mi><mml:mi>n</mml:mi></mml:msub><mml:mo>=</mml:mo><mml:mn>4.6</mml:mn></mml:mrow></mml:math> MeV
Fission product yields from the reaction at MeV Open
Here, we present cumulative fission product yields from the 238U (n, f) reaction at an incident energy of 4.6 MeV for fission products with half-lives from less than one second to several hours. We employed direct γ-ray spectros…
View article: Erratum: Monoenergetic photon-induced fission cross-section ratio measurements for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">U</mml:mi><mml:mprescripts/><mml:none/><mml:mn>235</mml:mn></mml:mmultiscripts><mml:mo>,</mml:mo></mml:math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">U</mml:mi><mml:mprescripts/><mml:none/><mml:mn>238</mml:mn></mml:mmultiscripts><mml:mo>,</mml:mo></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Pu</mml:mi><mml:mprescripts/><mml:none/><mml:mn>239</mml:mn></mml:mmultiscripts></mml:math> from 9.0 to 17.0 MeV [Phys. Rev. C <b>98</b>, 014608 (2018)]
Erratum: Monoenergetic photon-induced fission cross-section ratio measurements for and from 9.0 to 17.0 MeV [Phys. Rev. C <b>98</b>, 014608 (2018)] Open
In this erratum we report a correction to the previously published photofission cross-section ratio data. The actinide fission-chamber foils utilized in this work were extensively characterized during a new campaign using α- and γ-ray spec…
View article: Cross section for inelastic neutron scattering from 193Ir at 6 MeV
Cross section for inelastic neutron scattering from 193Ir at 6 MeV Open
Two samples, one of natural iridium and the other of enriched 193Ir, were irradiated with a monoenergetic neutron beam of energy 6.0 MeV at the Triangle Universities Nuclear Laboratory. The product of the 193Ir [Formu…
View article: The earliest DT nuclear fusion discoveries
The earliest DT nuclear fusion discoveries Open
We describe the earliest measurements of the DT fusion cross section commissioned by the Manhattan Project, first at Purdue University in 1943 and then at Los Alamos 1945-6 and later, in 1951-2. The Los Alamos measurements led to the reali…
View article: Observation of low-lying isomeric states in $^{136}$Cs: a new avenue for dark matter and solar neutrino detection in xenon detectors
Observation of low-lying isomeric states in $^{136}$Cs: a new avenue for dark matter and solar neutrino detection in xenon detectors Open
We report on new measurements establishing the existence of low-lying isomeric states in $^{136}$Cs using $γ$ rays produced in $^{136}$Xe(p,n)$^{136}$Cs reactions. Two states with $\mathcal{O}(100)$~ns lifetimes are placed in the decay seq…
View article: Studies of photo-nuclear reactions at astrophysical energies with an active-target TPC
Studies of photo-nuclear reactions at astrophysical energies with an active-target TPC Open
An experiment was conducted at the High Intensity γ-ray Source (HIγS) facility at the Triangle Universities Nuclear Laboratory (TUNL) in Durham, NC, USA to measure the cross-section of the key astrophysical thermonuclear reaction 12 C(α,γ)…
View article: Templates of expected measurement uncertainties
Templates of expected measurement uncertainties Open
The covariance committee of CSEWG (Cross Section Evaluation Working Group) established templates of expected measurement uncertainties for neutron-induced total, (n, γ ), neutron-induced charged-particle, and (n,xn) reaction cross sections…
View article: Neutral-current neutrino cross section and expected supernova signals for 40Ar from a three-fold increase in the magnetic dipole strength
Neutral-current neutrino cross section and expected supernova signals for 40Ar from a three-fold increase in the magnetic dipole strength Open
View article: Neutral-current neutrino cross section and expected supernova signals for $^{40}$Ar from a three-fold increase in the magnetic dipole strength
Neutral-current neutrino cross section and expected supernova signals for $^{40}$Ar from a three-fold increase in the magnetic dipole strength Open
In view of the great interest in liquid argon neutrino detectors, the $^{40}$Ar($γ,γ'$)$^{40}$Ar$^{*}$ reaction was revisited to guide a calculation of the neutral current neutrino cross section at supernova energies. Using the nuclear res…
View article: Model-independent determination of the dipole response of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Zn</mml:mi><mml:mprescripts/><mml:none/><mml:mn>66</mml:mn></mml:mmultiscripts></mml:math> using quasimonoenergetic and linearly polarized photon beams
Model-independent determination of the dipole response of using quasimonoenergetic and linearly polarized photon beams Open
Background: Photon strength functions are an important ingredient in calculations relevant for the nucleosynthesis of heavy elements. The relation to the photoabsorption cross section allows to experimentally constrain photon strength func…
View article: Model-independent determination of the dipole response of $^{66}$Zn using quasi-monoenergetic and linearly-polarized photon beams
Model-independent determination of the dipole response of $^{66}$Zn using quasi-monoenergetic and linearly-polarized photon beams Open
[Background] Photon strength functions are an important ingredient in calculations relevant for the nucleosynthesis of heavy elements. The relation to the photoabsorption cross section allows to experimentally constrain photon strength fun…
View article: Investigation of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">B</mml:mi><mml:mprescripts/><mml:none/><mml:mn>11</mml:mn></mml:mmultiscripts></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Ca</mml:mi><mml:mprescripts/><mml:none/><mml:mn>40</mml:mn></mml:mmultiscripts></mml:math> levels at 8–9 MeV by nuclear resonance fluorescence
Investigation of and levels at 8–9 MeV by nuclear resonance fluorescence Open
Here, we report on the measurement of 11B and 40Ca levels between excitation energies of 8 and 9 MeV using nuclear resonance fluorescence (NRF). The experiment was carried out with nearly monoenergetic and linearly po…
View article: Development of a rapid-transit system for precision nuclear physics measurements
Development of a rapid-transit system for precision nuclear physics measurements Open
View article: Majorana parameters of the interacting boson model of nuclear structure and their implication for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>0</mml:mn><mml:mi>ν</mml:mi><mml:mi>β</mml:mi><mml:mi>β</mml:mi></mml:mrow></mml:math> decay
Majorana parameters of the interacting boson model of nuclear structure and their implication for decay Open
Here, the well-known spherical-deformed-transitional nucleus and potential 0$\\textit{νββ}$ emitter 150Nd and its daughter 150Sm were investigated in nuclear resonance fluorescence experiments using quasimonoenergetic…
View article: Structure of high-lying levels populated in the 96Y →96Zr β decay
Structure of high-lying levels populated in the 96Y →96Zr β decay Open